PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/19-20:42:40
G01     125.1          12.7               12.1 +/-    2.05      31.8 +/-    2.05  0.030 / 0.030
G07     70.6           66.1               12.6 +/-    0.48      13.6 +/-    0.48  0.030 / 0.030
G08     48.3           36.5               10.9 +/-    1.11      16.8 +/-    1.11  0.150 / 0.090
G09     178.3          34.9               14.0 +/-    0.92      22.3 +/-    0.92  0.090 / 0.100
G11     114.2          37.0               12.9 +/-    0.64      19.7 +/-    0.64  0.080 / 0.100
G13     320.3          13.9               11.8 +/-    2.61      30.2 +/-    2.61  0.090 / 0.080
G17     199.2          18.1               13.1 +/-    1.66      30.2 +/-    1.66  0.030 / 0.030
G18     98.8           17.5               11.9 +/-    1.17      27.8 +/-    1.17  0.030 / 0.030
G28     274.8          51.0               13.9 +/-    3.50      17.3 +/-    3.50  0.090 / 0.350
G30     335.9          62.8               12.4 +/-    0.44      13.7 +/-    0.44  0.120 / 0.440